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Q. The total number of $\alpha$ and $\beta$particles emitted in the nuclear reaction $_{92}^{238} \mathrm{U} \rightarrow_{82}^{214} \mathrm{Pb}$ is [JEE 2009]
Q. The number of neutrons emitted when $_{92}^{235} \mathrm{U}$ undergoes controlled nuclear fission to $_{54}^{142} \mathrm{Xe}$ and 
is – [JEE 2010]
is – [JEE 2010]
Q. Bombardment of aluminium by $\alpha$ -particle leads to its artificial disintegration in two ways,(i) and (ii) as shown. Products X, Y and Z respectively are :
(A) proton, neutron, positron(B) neutron, positron, proton(C) proton, positron, neutron(D) positron, proton, neutron [JEE 2011]
(A) proton, neutron, positron(B) neutron, positron, proton(C) proton, positron, neutron(D) positron, proton, neutron [JEE 2011]
Q. The periodic table consists of 18 groups. An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element X as shown below. To which group , element X belongs in the periodic table ? [JEE 2012]
Q. In the nuclear transmutation
(X, Y) is(are)$(\mathrm{A})(\gamma, \mathrm{n})$(B) (p, D)(C) (n, D)$(\mathrm{D})(\gamma, \mathrm{D})$ [JEE 2013]
(X, Y) is(are)$(\mathrm{A})(\gamma, \mathrm{n})$(B) (p, D)(C) (n, D)$(\mathrm{D})(\gamma, \mathrm{D})$ [JEE 2013]
Q. A closed vessel with rigid walls contains 1 mol of 23892 $\mathrm{U}$ U and 1 mol of air at 298 K. Considering complete decay of $^{238}_{92} \mathrm{U}$ the ratio of the final pressure to the initial pressure of the system at 298 K is – [JEE 2015]
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